​<template>
    <div id="puzzle" ref="puzzle" style="display:inline-block;">
        <!-- :style="'padding:' + 16*scale + 'px ' + 16*scale + 'px ' + 28*scale + 'px;border-radius:'+16*scale+'px;'" -->
        <div class="puzzle-container">
            <div :style="'position:relative;overflow:hidden;width:' + dataWidth + 'px;'">
                <div :style="'position:relative;width:' + dataWidth + 'px;height:' + dataHeight + 'px;'">
                    <img id="scream" ref="scream" :src="imgRandom"
                        :style="'width:' + dataWidth + 'px;height:' + dataHeight + 'px;'" />
                    <canvas id="puzzle-box" ref="puzzleBox" :width="dataWidth" :height="dataHeight"></canvas>
                </div>
                <div class="puzzle-lost-box"
                    :style="'left:' + left_Num + 'px;width:' + dataWidth + 'px;height:' + dataHeight + 'px;'">
                    <canvas id="puzzle-shadow" ref="puzzleShadow" :width="dataWidth" :height="dataHeight"></canvas>
                    <canvas id="puzzle-lost" ref="puzzleLost" :width="dataWidth" :height="dataHeight"></canvas>
                </div>
                <p class="ver-tips" ref="verTips"
                    :style="'height: ' + 22 * scale + 'px;line-height:' + 22 * scale + 'px;bottom: ' + (displayTips == true ? 0 : -22 * scale) + 'px;font-size: ' + 12 * scale + 'px;'">
                    <template v-if="verification">
                        <span :style="'color:#42ca6b;line-height:' + 22 * scale + 'px;'">验证通过</span>
                        <span :style="'margin-left:' + 4 * scale + 'px;line-height:' + 22 * scale + 'px;'">哇喔,怪物吃了拼图,快去登录吧~</span>
                    </template>
                    <template v-if="!verification">
                        <span :style="'color:red;line-height:' + 22 * scale + 'px;'">验证失败:</span>
                        <span :style="'margin-left:' + 4 * scale + 'px;line-height:' + 22 * scale + 'px;'">拖动滑块将悬浮图像正确拼合</span>
                    </template>
                </p>
            </div>
            <div class="re-btn" @click="refreshImg"
                :style="'height: ' + 28 * scale + 'px;padding: ' + 1 * scale + 'px ' + 16 * scale + 'px;font-size: ' + 18 * scale + 'px;'">
                <!-- <a-icon type="redo" /> -->
            </div>
        </div>
        <br />
        <div class="slider-container" :style="'width:' + dataWidth + 'px;'">
            <div class="slider-bar" :style="'border-radius:' + 24 * scale + 'px;'">
                <p class="slider-bar-text select-none" onselectstart="return false"
                    :style="'line-height:' + 28 * scale + 'px;font-size:' + 12 * scale + 'px;'">按住滑块， 拖动完成上方拼图</p>
            </div>
            <div class="slider-btn" ref="sliderBtn" @mousedown="startMove" @touchstart="startMove"
                :style="'top: ' + -7 * scale + 'px;'">
                <!-- <a-icon type="pause-circle" theme="twoTone" twoToneColor="#52c41a"
                    :style="'font-size: ' + 44 * scale + 'px;'" /> -->
                <span class="slider-center-zzz">▍▍▍</span>
            </div>
        </div>
    </div>
</template>
 
<script lang="js">

export default {
    name: 'puzzle',
    data() {
        return {
            moveStart: '',
            displayTips: false,
            verification: false,
            randomX: null,
            randomY: null,
            imgRandom: '',
            left_Num: 0,
            dataWidth: 404,
            dataHeight: 90,
            puzzleSize: 100,
            deviation: 11,
            scale: 1,
            reTimer: null,
            isleavePage: false
        }
    },
    props: {
        width: {
            type: [String, Number],
            default: 340
        },
        height: {
            type: [String, Number],
            default: 120
        },
        cropImage: {
            type: [Boolean],
            default: false
        },
        puzzleImgList: {
            type: Array,
            default: () => [
                '../../../static/img/a.png',
            ]
        },
        PlSize: {
            type: [String, Number],
            default: 48
        },
        Deviation: {
            type: [String, Number],
            default: 4
        },
        padding: {
            type: [Number],
            default: 20
        },
        onSuccess: {
            type: Function,
            default: () => {
                alert('验证成功')
            }
        },
        onError: {
            type: Function,
            default: () => {
                alert('验证失败')
            }
        }
    },
    methods: {
        /* 刷新 */
        RandomNum(Min, Max) {
            let Range = Max - Min + 1
            let Rand = Math.random()
            return Min + Math.floor(Rand * Range)
        },
        refreshImg() {
            let imgRandomNum = this.RandomNum(0, this.puzzleImgList.length - 1)
            this.imgRandom = this.puzzleImgList[imgRandomNum]
            this.initCanvas()
        },
        /* 画布初始化 */
        initCanvas() {
            this.clearCanvas()

            // let self = this
            let w = this.dataWidth
            let h = this.dataHeight
            // let PL_Size = 48
            // 2019-02-12开始PL_Size使用可传递参数
            let PL_Size = this.puzzleSize
            let padding = 20
            let MinN_X = padding + PL_Size
            let MaxN_X = w - padding - PL_Size - PL_Size / 6
            let MaxN_Y = padding
            let MinN_Y = h - padding - PL_Size - PL_Size / 6
            this.randomX = this.RandomNum(MinN_X, MaxN_X)
            this.randomY = this.RandomNum(MinN_Y, MaxN_Y)
            let X = this.randomX
            let Y = this.randomY
            this.left_Num = -X + 10
            let d = PL_Size / 3

            let c = this.$refs.puzzleBox
            let c_l = this.$refs.puzzleLost
            let c_s = this.$refs.puzzleShadow
            let ctx = c.getContext('2d')
            let ctx_l = c_l.getContext('2d')
            let ctx_s = c_s.getContext('2d')
            ctx.globalCompositeOperation = 'xor'
            ctx.shadowBlur = 10
            ctx.shadowColor = '#fff'
            ctx.shadowOffsetX = 3
            ctx.shadowOffsetY = 3
            ctx.fillStyle = 'rgba(0,0,0,0.7)'
            ctx.beginPath()
            ctx.lineWidth = '1'
            ctx.strokeStyle = 'rgba(0,0,0,0)'
            ctx.moveTo(X, Y)
            ctx.lineTo(X + d, Y)
            ctx.bezierCurveTo(X + d, Y - d, X + 2 * d, Y - d, X + 2 * d, Y)
            ctx.lineTo(X + 3 * d, Y)
            ctx.lineTo(X + 3 * d, Y + d)
            ctx.bezierCurveTo(X + 2 * d, Y + d, X + 2 * d, Y + 2 * d, X + 3 * d, Y + 2 * d)
            ctx.lineTo(X + 3 * d, Y + 3 * d)
            ctx.lineTo(X, Y + 3 * d)
            ctx.closePath()
            ctx.stroke()
            ctx.fill()

            let img = new Image()
            img.src = this.imgRandom
            img.onload = function () {
                ctx_l.beginPath()
                ctx_l.strokeStyle = 'rgba(0,0,0,0)'
                ctx_l.moveTo(X, Y)
                ctx_l.lineTo(X + d, Y)
                ctx_l.bezierCurveTo(X + d, Y - d, X + 2 * d, Y - d, X + 2 * d, Y)
                ctx_l.lineTo(X + 3 * d, Y)
                ctx_l.lineTo(X + 3 * d, Y + d)
                ctx_l.bezierCurveTo(X + 2 * d, Y + d, X + 2 * d, Y + 2 * d, X + 3 * d, Y + 2 * d)
                ctx_l.lineTo(X + 3 * d, Y + 3 * d)
                ctx_l.lineTo(X, Y + 3 * d)
                ctx_l.closePath()
                ctx_l.stroke()
                ctx_l.shadowBlur = 10
                ctx_l.shadowColor = 'black'
                ctx_l.clip()
                ctx_l.drawImage(img, 0, 0, w, h)

            }
            ctx_s.beginPath()
            ctx_s.lineWidth = '1'
            ctx_s.strokeStyle = 'rgba(0,0,0,0)'
            ctx_s.moveTo(X, Y)
            ctx_s.lineTo(X + d, Y)
            ctx_s.bezierCurveTo(X + d, Y - d, X + 2 * d, Y - d, X + 2 * d, Y)
            ctx_s.lineTo(X + 3 * d, Y)
            ctx_s.lineTo(X + 3 * d, Y + d)
            ctx_s.bezierCurveTo(X + 2 * d, Y + d, X + 2 * d, Y + 2 * d, X + 3 * d, Y + 2 * d)
            ctx_s.lineTo(X + 3 * d, Y + 3 * d)
            ctx_s.lineTo(X, Y + 3 * d)
            ctx_s.closePath()
            ctx_s.stroke()
            ctx_s.shadowBlur = 20
            ctx_s.shadowColor = 'black'
            ctx_s.fill()
        },
        /* 通过重置画布尺寸清空画布，这种方式更彻底 */
        clearCanvas() {
            let c = this.$refs.puzzleBox
            let c_l = this.$refs.puzzleLost
            let c_s = this.$refs.puzzleShadow
            c.setAttribute('height', c.getAttribute('height'))
            c_l.setAttribute('height', c.getAttribute('height'))
            c_s.setAttribute('height', c.getAttribute('height'))
            // c.height = c.height
            // c_l.height = c_l.height
            // c_s.height = c_s.height
        },
        /* 按住滑块后初始化移动监听，记录初始位置 */
        startMove(e) {
            console.log(e)
            e = e || window.event
            this.$refs.sliderBtn.style.backgroundPosition = '0 -216px'
            this.moveStart = e.pageX || e.targetTouches[0].pageX
            this.addMouseMoveListener()
        },
        /* 滑块移动 */
        moving(e) {
            let self = this
            e = e || window.event
            let moveX = e.pageX || e.targetTouches[0].pageX
            let d = moveX - self.moveStart
            let w = self.dataWidth
            let PL_Size = this.puzzleSize
            let padding = 20
            if (self.moveStart === '') {
                return ''
            }
            if (d < 0 || d > (w - padding - PL_Size)) {
                return ''
            }
            self.$refs.sliderBtn.style.left = d + 'px'
            self.$refs.sliderBtn.style.transition = 'inherit'
            self.$refs.puzzleLost.style.left = d + 'px'
            self.$refs.puzzleLost.style.transition = 'inherit'
            self.$refs.puzzleShadow.style.left = d + 'px'
            self.$refs.puzzleShadow.style.transition = 'inherit'
        },
        /* 移动结束，验证并回调 */
        moveEnd(e) {
            let self = this
            e = e || window.event
            let moveEnd_X = (e.pageX || e.changedTouches[0].pageX) - self.moveStart
            let ver_Num = self.randomX - 10
            let deviation = this.deviation
            let Min_left = ver_Num - deviation
            let Max_left = ver_Num + deviation
            if (self.moveStart !== '') {
                if (Max_left > moveEnd_X && moveEnd_X > Min_left) {

                    self.displayTips = true
                    self.verification = true
                    setTimeout(function () {
                        if (self.isleavePage) {
                            return
                        }
                        self.displayTips = false
                        self.initCanvas()
                    }, 2000)
                    /* 成功的回调函数 */
                    self.onSuccess()
                } else {
                    self.displayTips = true
                    self.verification = false
                    setTimeout(function () {
                        if (self.isleavePage) {
                            return
                        }
                        self.displayTips = false
                    }, 2000)
                    /* 失败的回调函数 */
                    self.onError()
                }
            }
            if (typeof (self.$refs.sliderBtn) !== 'undefined' && typeof (self.$refs.puzzleLost) !== 'undefined' && typeof (self.$refs.puzzleShadow) !== 'undefined') {
                self.reTimer = setTimeout(function () {
                    if (self.isleavePage) {
                        return
                    }
                    self.$refs.sliderBtn.style.left = 0
                    self.$refs.sliderBtn.style.transition = 'left 0.5s'
                    self.$refs.puzzleLost.style.left = 0
                    self.$refs.puzzleLost.style.transition = 'left 0.5s'
                    self.$refs.puzzleShadow.style.left = 0
                    self.$refs.puzzleShadow.style.transition = 'left 0.5s'
                }, 1000)
                self.$refs.sliderBtn.style.backgroundPosition = '0 -84px'
            }
            self.moveStart = ''
        },
        /* 绑定滑块移动与滑动结束，移动过程中鼠标可在绑定的区域 */
        addMouseMoveListener() {
            let self = this
            document.addEventListener('mousemove', self.moving)
            document.addEventListener('touchmove', self.moving)
            document.addEventListener('mouseup', self.moveEnd)
            document.addEventListener('touchend', self.moveEnd)
        }

    },
    mounted() {
        let self = this
        this.dataWidth = this.$refs.puzzle.clientWidth * 0.884
        this.dataHeight = this.dataWidth * (this.height / this.width)
        this.scale = this.$refs.puzzle.clientWidth / 260
        this.puzzleSize = this.dataWidth * (this.PlSize / this.width)
        setTimeout(self.refreshImg, 0)
    },
    created() {
        let imgRandomNum = this.RandomNum(0, this.puzzleImgList.length - 1)
        this.imgRandom = this.puzzleImgList[imgRandomNum]
        this.puzzleSize = Number(this.PlSize)
        this.deviation = Number(this.Deviation)

        // this.dataWidth = this.width
        // this.dataHeight = this.height
        // this.scale = this.width/260
    },
    watch: {
    },
    beforeDestroy() {
        this.isleavePage = true
    }
}
</script>
 
<style scoped>
.slider-btn {
    position: absolute;
    width: 90px;
    height: 67px;
    left: 0;
    top: -7px;
    z-index: 12;
    cursor: pointer;
    background-position: 0 -84px;
    transition: inherit;
    background-color: #f4f7fe;
    border-radius: 45%;
    display: flex;
}

.slider-center-zzz {
    text-align: center;
    line-height: 67px;
    position: absolute;
    color: #53C300;
    height: 40px;
    width: 100%;
}

.ver-tips {
    position: absolute;
    left: 0;
    bottom: -22px;
    background: rgba(255, 255, 255, 0.9);
    height: 22px;
    line-height: 22px;
    font-size: 12px;
    width: 100%;
    margin: 0;
    text-align: left;
    padding: 0 8px;
    transition: all 0.4s;
}

.slider-tips {
    bottom: 0;
}

.ver-tips i {
    display: inline-block;
    width: 22px;
    height: 22px;
    vertical-align: top;
    background-position: -4px -1229px;
}

.ver-tips span {
    display: inline-block;
    vertical-align: top;
    line-height: 22px;
    color: #455;
}

.active-tips {
    display: block;
}

.hidden {
    display: none;
}

.re-btn {
    position: absolute;
    left: 0;
    bottom: 0;
    height: 28px;
    padding: 0 16px;
}

.re-btn a {
    display: inline-block;
    width: 14px;
    height: 14px;
    margin: 0px 0;
    background-position: 0 -1179px;
    cursor: pointer;
}

.re-btn a:hover {
    background-position: 0 -1193px;
}

.puzzle-container {
    position: relative;
    /* padding: 16px 16px 28px; */
    /* border: 1px solid #ddd; */
    background: #e0e1e3;
    /* border-radius: 16px; */

    /* height: 83px; */
    /* width: 340px; */
}

.slider-container {
    position: relative;
    margin: auto;
}

.slider-bar {
    border: 1px solid #c3c3c3;
    border-radius: 24px;
    background: #e0e1e3;
    box-shadow: 0 1px 1px rgba(12, 10, 10, 0.2) inset;
}

.slider-bar-text {
    font-size: 12px;
    color: #486c80;
    line-height: 28px;
    margin: 0;
    text-align: right;
    padding-right: 22px;
}

#puzzle-box {
    position: absolute;
    left: 0;
    top: 0;
    z-index: 22;
}

#puzzle-shadow {
    position: absolute;
    left: 0;
    top: 0;
    z-index: 22;
}

#puzzle-lost {
    position: absolute;
    left: 0;
    top: 0;
    z-index: 33;
}

.puzzle-lost-box {
    position: absolute;
    width: 260px;
    height: 116px;
    left: 0;
    top: 0;
    z-index: 111;
}
</style>